Product Description Specifications: Color: Black Material:Rubber Foaming Single Wheel Diameter: 9cm / 3.5 inch Tri-Wheel Diameter: 21cm / 8 inch Mounting Hole Size: 8mm / 0.3 inch Load Capacity: 10kg / 17lbs/piece Features: The foam material provides cushioning, reducing the impact on surfaces and minimizing noise while rolling. The mounting shaft should be 1.3 inch / 32mm in length at least and 7-8mm / 0.28-0.31 inch in width. The end of the shaft should have a groove. The unique feature of stair climbing wheels is their ability to "climb" steps, allowing the wheels to roll smoothly as they move up or down each step. Stair climbing wheels are designed specifically to navigate stairs and other uneven surfaces. They are commonly used on shopping bags, carts, or dolly to make it easier to transport heavy loads up and down stairs without having to lift or carry them. This stair climbing wheels are not limited to just stairs; they can also handle various terrains such as curbs, thresholds, or uneven surfaces. Package Includes: 2 x Shopping Cart Stair Climbing Wheel #productDescription { color: #333333; word-wrap: break-word; font-size: small; line-height: initial; margin: 0.5em 0px 0em 25px; } #productDescription_feature_div > h2.default { font-size: medium; margin: 0 0 0.25em; } #productDescription_feature_div > h2.books { color:#333 !important; font-size:21px !important; line-height: 1.3; padding-bottom: 4px; font-weight: normal; margin: 0px; } #productDescription_feature_div > h2.softlines { color:#333 !important; font-size:21px !important; line-height: 1.3; padding-bottom: 4px; font-weight: bold; margin: 0px; } #productDescription > p, #productDescription > div, #productDescription > table { margin: 0 0 1em 0; } #productDescription p { margin: 0em 0 1em 1em; } #productDescription h3 { font-weight: normal; color: #333333; font-size: 1.23em; clear: left; margin: 0.75em 0px 0.375em -15px; } #productDescription table { border-collapse: inherit !important; margin-bottom: 0; } #productDescription table img { max-width: inherit !important; } #productDescription table td { font-size: small; vertical-align: inherit !important; } #productDescription ul li { margin: 0 0 0 20px; } #productDescription ul li ul { list-style-type: disc !important; margin-left: 20px !important; } #productDescription ul ul li { list-style-type: disc !important; margin-left: 20px !important; } #productDescription > ul ul li { list-style-type: disc !important; } #productDescription ul li ul li { margin: 0 0 0 20px; } #productDescription .aplus p { margin: 0 0 1em 0; } #productDescription small { font-size: smaller; } #productDescription.prodDescWidth { max-width: 1000px } P.when('jQuery').execute(function($){ $("#productDescription table").each(function() { var width = $(this).attr('width'); if (width) width += 'px'; else width = 'auto'; $(this).css('width', width); var padding = $(this).attr('cellpadding'); if (padding) padding += 'px'; else padding = '0px'; $(this).css('padding', padding); }); }); #productDescription h3 { margin: 0.75em 0px 0.375em -1px; }